Apparently with the appropriate angle of a pelvic thrust combined the proper amount of stalking and backhanded, manhandling protection, a woman can orgasm with three short thrusts.
I don't give books star ratings; I give them bite ratings. This is a bite. A book can get up to five of these evil-looking chompers, including half bites.
You can attribute your own wording to the ratings. Five's the best, three's decent, one and under isn't worth the gas to go to the library. I'll leave it to you to fill in the blanks.